<?php

// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
// $Id: UploadFile_sae.class.php 2766 2012-02-20 15:58:21Z luofei614@gmail.com $

/**
 +------------------------------------------------------------------------------
 * 文件上传类
 +------------------------------------------------------------------------------
 * @category   ORG
 * @package  ORG
 * @subpackage  Net
 * @author    liu21st <liu21st@gmail.com>
 * @version   $Id: UploadFile_sae.class.php 2766 2012-02-20 15:58:21Z luofei614@gmail.com $
 +------------------------------------------------------------------------------
 */
class UploadFile {//类定义开始
	// 上传文件的最大值

	public $maxSize = -1;
	// 是否支持多文件上传
	public $supportMulti = true;
	// 允许上传的文件后缀
	//  留空不作后缀检查
	public $allowExts = array();
	// 允许上传的文件类型
	// 留空不做检查
	public $allowTypes = array();
	// 使用对上传图片进行缩略图处理
	public $thumb = false;
	// 图库类包路径
	public $imageClassPath = 'ORG.Util.Image';
	// 缩略图最大宽度
	public $thumbMaxWidth;
	// 缩略图最大高度
	public $thumbMaxHeight;
	// 缩略图前缀
	public $thumbPrefix = 'thumb_';
	public $thumbSuffix = '';
	// 缩略图保存路径
	public $thumbPath = '';
	// 缩略图文件名
	public $thumbFile = '';
	// 是否移除原图
	public $thumbRemoveOrigin = false;
	// 压缩图片文件上传
	public $zipImages = false;
	// 启用子目录保存文件
	public $autoSub = false;
	// 子目录创建方式 可以使用hash date
	public $subType = 'hash';
	public $dateFormat = 'Ymd';
	public $hashLevel = 1; // hash的目录层次
	// 上传文件保存路径
	public $savePath = '';
	public $autoCheck = true; // 是否自动检查附件
	// 存在同名是否覆盖
	public $uploadReplace = false;
	// 上传文件命名规则
	// 例如可以是 time uniqid com_create_guid 等
	// 必须是一个无需任何参数的函数名 可以使用自定义函数
	public $saveRule = '';
	// 上传文件Hash规则函数名
	// 例如可以是 md5_file sha1_file 等
	public $hashType = 'md5_file';
	// 错误信息
	private $error = '';
	// 上传成功的文件信息
	private $uploadFileInfo;
	//[sae] domain
	private $domain;
	private $thumbDomain;

	/**
	 +----------------------------------------------------------
	 * 架构函数
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 */
	public function __construct($maxSize='', $allowExts='', $allowTypes='', $savePath='', $saveRule='') {
		if (!empty($maxSize) && is_numeric($maxSize)) {
			$this->maxSize = $maxSize;
		}
		if (!empty($allowExts)) {
			if (is_array($allowExts)) {
				$this->allowExts = array_map('strtolower', $allowExts);
			} else {
				$this->allowExts = explode(',', strtolower($allowExts));
			}
		}
		if (!empty($allowTypes)) {
			if (is_array($allowTypes)) {
				$this->allowTypes = array_map('strtolower', $allowTypes);
			} else {
				$this->allowTypes = explode(',', strtolower($allowTypes));
			}
		}
		if (!empty($saveRule)) {
			$this->saveRule = $saveRule;
		} else {
			$this->saveRule = C('UPLOAD_FILE_RULE');
		}
		$this->savePath = $savePath;
	}

	/**
	 +----------------------------------------------------------
	 * 上传一个文件
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param mixed $name 数据
	 * @param string $value  数据表名
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 * @throws ThinkExecption
	 +----------------------------------------------------------
	 */
	private function save($file) {
		$filename = $file['savepath'] . $file['savename'];
		$s = Think::instance('SaeStorage');
		if (!$this->uploadReplace && $s->fileExists($this->domain, $filename)) {
			// 不覆盖同名文件
			$this->error = '文件已经存在！' . $filename;
			return false;
		}
		// 如果是图像文件 检测文件格式
		if (in_array(strtolower($file['extension']), array('gif', 'jpg', 'jpeg', 'bmp', 'png', 'swf')) && false === getimagesize($file['tmp_name'])) {
			$this->error = '非法图像文件';
			return false;
		}
		//if(!move_uploaded_file($file['tmp_name'], $this->autoCharset($filename,'utf-8','gbk'))) {
		if (!$this->thumbRemoveOrigin && !$s->upload($this->domain, $filename, $file['tmp_name']) ) {
			$this->error = $s->errno() == -7 ? 'domain [ ' . $this->domain . ' ] 不存在！请在SAE控制台的Storage服务中添加一个domain' : '文件上传保存错误！';
			return false;
		}
		if ($this->thumb && in_array(strtolower($file['extension']), array('gif', 'jpg', 'jpeg', 'bmp', 'png'))) {
			$image = getimagesize($file['tmp_name']);
			if (false !== $image) {
				//是图像文件生成缩略图
				$thumbWidth = explode(',', $this->thumbMaxWidth);
				$thumbHeight = explode(',', $this->thumbMaxHeight);
				$thumbPrefix = explode(',', $this->thumbPrefix);
				$thumbSuffix = explode(',', $this->thumbSuffix);
				$thumbFile = explode(',', $this->thumbFile);
				$thumbPath = $this->thumbPath ? $this->thumbPath : $file['savepath'];
				//[sae] 定义缩略图目录时，判断doamin
				$domain = $this->thumbPath ? $this->thumbDomain : $this->domain;
				//[sae] 用自带image类生成缩略图
				$realFilename = $this->autoSub ? basename($file['savename']) : $file['savename'];
				$srcWidth = $image[0];
				$srcHeight = $image[1];
				$img = Think::instance('SaeImage');
				for ($i = 0, $len = count($thumbWidth); $i < $len; $i++) {
					$scale = min($thumbWidth[$i] / $srcWidth, $thumbHeight[$i] / $srcHeight); // 计算缩放比例
					if ($scale >= 1) {
						// 超过原图大小不再缩略
						$width = $srcWidth;
						$height = $srcHeight;
					} else {
						// 缩略图尺寸
						$width = (int) ($srcWidth * $scale);
						$height = (int) ($srcHeight * $scale);
					}
					$thumbname = $thumbPrefix[$i] . substr($realFilename, 0, strrpos($realFilename, '.')) . $thumbSuffix[$i] . '.' . $file['extension'];
					$img->setData(file_get_contents($file['tmp_name']));
					$img->resize($width, $height);
					$new_data = $img->exec();
					if (!$s->write($domain, $thumbPath . $thumbname, $new_data)) {
						$this->error = $s->errno() == -7 ? 'domain [ ' . $this->domain . ' ] 不存在！请在SAE控制台的Storage服务中添加一个domain' : '生成缩略图失败！';
						return false;
					}
				}
			}
		}
		if ($this->zipImags) {
			// TODO 对图片压缩包在线解压
		}
		return true;
	}

	//[sae]获得domain，改变path
	private function getDomain($filePath) {
		$arr = explode('/', ltrim($filePath, './'));
		$domain = array_shift($arr);
		$filePath = implode('/', $arr);
		return array($domain, $filePath);
	}

	/**
	 +----------------------------------------------------------
	 * 上传所有文件
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $savePath  上传文件保存路径
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 * @throws ThinkExecption
	 +----------------------------------------------------------
	 */
	public function upload($savePath ='') {
		//如果不指定保存文件名，则由系统默认
		if (empty($savePath))
		$savePath = $this->savePath;
		//[sae] 去掉检查上传目录
		$fileInfo = array();
		$isUpload = false;
		//[sae] 分析出domain，第一个目录为domain
		list($this->domain, $savePath) = $this->getDomain($savePath);
		//[sae] 分析缩略图保存地址
		if ($this->thumb && $this->thumbPath)
		list($this->thumbDomain, $this->thumbPath) = $this->getDomain($this->thumbPath);
		// 获取上传的文件信息
		// 对$_FILES数组信息处理
		$files = $this->dealFiles($_FILES);
		foreach ($files as $key => $file) {
			//过滤无效的上传
			if (!empty($file['name'])) {
				//登记上传文件的扩展信息
				$file['key'] = $key;
				$file['extension'] = $this->getExt($file['name']);
				$file['savepath'] = $savePath;
				$file['savename'] = $this->getSaveName($file);

				// 自动检查附件
				if ($this->autoCheck) {
					if (!$this->check($file))
					return false;
				}

				//保存上传文件
				if (!$this->save($file))
				return false;
				if (function_exists($this->hashType)) {
					$fun = $this->hashType;
					$file['hash'] = $fun($this->autoCharset($file['savepath'] . $file['savename'], 'utf-8', 'gbk'));
				}
				//上传成功后保存文件信息，供其他地方调用
				unset($file['tmp_name'], $file['error']);
				$fileInfo[] = $file;
				$isUpload = true;
			}
		}
		if ($isUpload) {
			$this->uploadFileInfo = $fileInfo;
			return true;
		} else {
			$this->error = '没有选择上传文件';
			return false;
		}
	}

	/**
	 +----------------------------------------------------------
	 * 上传单个上传字段中的文件 支持多附件
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param array $file  上传文件信息
	 * @param string $savePath  上传文件保存路径
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 * @throws ThinkExecption
	 +----------------------------------------------------------
	 */
	public function uploadOne($file, $savePath='') {
		//如果不指定保存文件名，则由系统默认
		if (empty($savePath))
		$savePath = $this->savePath;
		//[sae] 不检查上传目录
		//[sae] 分析出domain，第一个目录为domain
		list($this->domain, $savePath) = $this->getDomain($savePath);
		//[sae] 分析缩略图保存地址
		if ($this->thumb && $this->thumbPath)
		list($this->thumbDomain, $this->thumbPath) = $this->getDomain($this->thumbPath);
		//过滤无效的上传
		if (!empty($file['name'])) {
			$fileArray = array();
			if (is_array($file['name'])) {
				$keys = array_keys($file);
				$count = count($file['name']);
				for ($i = 0; $i < $count; $i++) {
					foreach ($keys as $key)
					$fileArray[$i][$key] = $file[$key][$i];
				}
			} else {
				$fileArray[] = $file;
			}
			$info = array();
			foreach ($fileArray as $key => $file) {
				//登记上传文件的扩展信息
				$file['extension'] = $this->getExt($file['name']);
				$file['savepath'] = $savePath;
				$file['savename'] = $this->getSaveName($file);
				// 自动检查附件
				if ($this->autoCheck) {
					if (!$this->check($file))
					return false;
				}
				//保存上传文件
				if (!$this->save($file))
				return false;
				if (function_exists($this->hashType)) {
					$fun = $this->hashType;
					$file['hash'] = $fun($this->autoCharset($file['savepath'] . $file['savename'], 'utf-8', 'gbk'));
				}
				unset($file['tmp_name'], $file['error']);
				$info[] = $file;
			}
			// 返回上传的文件信息
			return $info;
		} else {
			$this->error = '没有选择上传文件';
			return false;
		}
	}

	/**
	 +----------------------------------------------------------
	 * 转换上传文件数组变量为正确的方式
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param array $files  上传的文件变量
	 +----------------------------------------------------------
	 * @return array
	 +----------------------------------------------------------
	 */
	private function dealFiles($files) {
		$fileArray = array();
		$n = 0;
		foreach ($files as $file) {
			if (is_array($file['name'])) {
				$keys = array_keys($file);
				$count = count($file['name']);
				for ($i = 0; $i < $count; $i++) {
					foreach ($keys as $key)
					$fileArray[$n][$key] = $file[$key][$i];
					$n++;
				}
			} else {
				$fileArray[$n] = $file;
				$n++;
			}
		}
		return $fileArray;
	}

	/**
	 +----------------------------------------------------------
	 * 获取错误代码信息
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @param string $errorNo  错误号码
	 +----------------------------------------------------------
	 * @return void
	 +----------------------------------------------------------
	 * @throws ThinkExecption
	 +----------------------------------------------------------
	 */
	protected function error($errorNo) {
		switch ($errorNo) {
			case 1:
				$this->error = '上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值';
				break;
			case 2:
				$this->error = '上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值';
				break;
			case 3:
				$this->error = '文件只有部分被上传';
				break;
			case 4:
				$this->error = '没有文件被上传';
				break;
			case 6:
				$this->error = '找不到临时文件夹';
				break;
			case 7:
				$this->error = '文件写入失败';
				break;
			default:
				$this->error = '未知上传错误！';
		}
		return;
	}

	/**
	 +----------------------------------------------------------
	 * 根据上传文件命名规则取得保存文件名
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param string $filename 数据
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	private function getSaveName($filename) {
		$rule = $this->saveRule;
		if (empty($rule)) {//没有定义命名规则，则保持文件名不变
			$saveName = $filename['name'];
		} else {
			if (function_exists($rule)) {
				//使用函数生成一个唯一文件标识号
				$saveName = $rule() . "." . $filename['extension'];
			} else {
				//使用给定的文件名作为标识号
				$saveName = $rule . "." . $filename['extension'];
			}
		}
		if ($this->autoSub) {
			// 使用子目录保存文件
			$filename['savename'] = $saveName;
			$saveName = $this->getSubName($filename) . '/' . $saveName;
		}
		return $saveName;
	}

	/**
	 +----------------------------------------------------------
	 * 获取子目录的名称
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param array $file  上传的文件信息
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	private function getSubName($file) {
		switch ($this->subType) {
			case 'date':
				$dir = date($this->dateFormat, time());
				break;
			case 'hash':
			default:
				$name = md5($file['savename']);
				$dir = '';
				for ($i = 0; $i < $this->hashLevel; $i++) {
					$dir .= $name{$i} . '/';
				}
				break;
		}
		if (!is_dir($file['savepath'] . $dir)) {
			mk_dir($file['savepath'] . $dir);
		}
		return $dir;
	}

	/**
	 +----------------------------------------------------------
	 * 检查上传的文件
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param array $file 文件信息
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	private function check($file) {
		if ($file['error'] !== 0) {
			//文件上传失败
			//捕获错误代码
			$this->error($file['error']);
			return false;
		}
		//文件上传成功，进行自定义规则检查
		//检查文件大小
		if (!$this->checkSize($file['size'])) {
			$this->error = '上传文件大小不符！';
			return false;
		}

		//检查文件Mime类型
		if (!$this->checkType($file['type'])) {
			$this->error = '上传文件MIME类型不允许！';
			return false;
		}
		//检查文件类型
		if (!$this->checkExt($file['extension'])) {
			$this->error = '上传文件类型不允许';
			return false;
		}

		//检查是否合法上传
		if (!$this->checkUpload($file['tmp_name'])) {
			$this->error = '非法上传文件！';
			return false;
		}
		return true;
	}

	// 自动转换字符集 支持数组转换
	private function autoCharset($fContents, $from='gbk', $to='utf-8') {
		$from = strtoupper($from) == 'UTF8' ? 'utf-8' : $from;
		$to = strtoupper($to) == 'UTF8' ? 'utf-8' : $to;
		if (strtoupper($from) === strtoupper($to) || empty($fContents) || (is_scalar($fContents) && !is_string($fContents))) {
			//如果编码相同或者非字符串标量则不转换
			return $fContents;
		}
		if (function_exists('mb_convert_encoding')) {
			return mb_convert_encoding($fContents, $to, $from);
		} elseif (function_exists('iconv')) {
			return iconv($from, $to, $fContents);
		} else {
			return $fContents;
		}
	}

	/**
	 +----------------------------------------------------------
	 * 检查上传的文件类型是否合法
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param string $type 数据
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	private function checkType($type) {
		if (!empty($this->allowTypes))
		return in_array(strtolower($type), $this->allowTypes);
		return true;
	}

	/**
	 +----------------------------------------------------------
	 * 检查上传的文件后缀是否合法
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param string $ext 后缀名
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	private function checkExt($ext) {
		if (!empty($this->allowExts))
		return in_array(strtolower($ext), $this->allowExts, true);
		return true;
	}

	/**
	 +----------------------------------------------------------
	 * 检查文件大小是否合法
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param integer $size 数据
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	private function checkSize($size) {
		return!($size > $this->maxSize) || (-1 == $this->maxSize);
	}

	/**
	 +----------------------------------------------------------
	 * 检查文件是否非法提交
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param string $filename 文件名
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	private function checkUpload($filename) {
		return is_uploaded_file($filename);
	}

	/**
	 +----------------------------------------------------------
	 * 取得上传文件的后缀
	 +----------------------------------------------------------
	 * @access private
	 +----------------------------------------------------------
	 * @param string $filename 文件名
	 +----------------------------------------------------------
	 * @return boolean
	 +----------------------------------------------------------
	 */
	private function getExt($filename) {
		$pathinfo = pathinfo($filename);
		return $pathinfo['extension'];
	}

	/**
	 +----------------------------------------------------------
	 * 取得上传文件的信息
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return array
	 +----------------------------------------------------------
	 */
	public function getUploadFileInfo() {
		return $this->uploadFileInfo;
	}

	/**
	 +----------------------------------------------------------
	 * 取得最后一次错误信息
	 +----------------------------------------------------------
	 * @access public
	 +----------------------------------------------------------
	 * @return string
	 +----------------------------------------------------------
	 */
	public function getErrorMsg() {
		return $this->error;
	}

}